Theodore Samuel Williams was an American professional baseball player and manager. He played his entire 19-year Major League Baseball (MLB) career, primarily as a left fielder, for the Boston Red Sox from 1939 to 1960; his career was interrupted by military service during World War II and the Korean War. Nicknamed "Teddy Ballgame", "the Kid", "the Splendid Splinter", and "the Thumper", Williams is widely regarded as one of the greatest hitters in baseball history and to date is the last player to hit over .400 in a season. His .482 on-base percentage is the highest of all time.

In baseball, batting average (BA) is determined by dividing a player's hits by their total at-bats. It is usually rounded to three decimal places and read without the decimal: A player with a batting average of .300 is "batting three-hundred". If necessary to break ties, batting averages could be taken beyond the .001 measurement. In this context, .001 is considered a "point", such that a .235 batter is 5 points higher than a .230 batter.